Sinorhizobium meliloti
From DrugPedia: A Wikipedia for Drug discovery
Sinorhizobium meliloti
It is a Gram-negative nitrogen-fixing bacterium (rhizobium) and forms a symbiotic relationship with legumes from the genera Medicago, Melilotus and Trigonella, including the model legume Medicago truncatula. This symbiosis results in a new plant organ termed a root nodule.
| Kingdom | Bacteria |
|---|---|
| Phylum | Proteobacteria |
| Class | Alpha Proteobacteria |
| Order | Rhizobiales |
| Family | Rhizobiaceae |
| Genus | Sinorhizobium |
| Species | S. meliloti |
| Binomial | Sinorhizobium meliloti |
Contents |
[edit] Surface Characteristics
The K antigens of Sinorhizobium spp. are major strain-specific antigens, which commonly consist of small repeating units of a hexose and 1-carboxy-2-keto-3-deoxy sugars, such as sialic acid or 3-deoxy-D-manno-2-octulosonic acid (Kdo), although they vary in glycosyl residue composition, substitution patterns, linkage points, anomeric configuration, and size range. The K-antigens of rhizobia do not possess a lipid anchor
[edit] Symbiosis
The symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti tThe symbiosis between S. meliloti and its plant hosts begins when the plant secretes an array of betaines and flavonoids into the rhizosphere: 4,4'-dihydroxy-2'-methoxychalcone, chrysoeriol, cynaroside, 4',7-dihydroxyflavone, 6′′-O-malonylononin, liquiritigenin, luteolin, 3',5-dimethoxyluteolin, 5-methoxyluteolin, medicarpin, stachydrine, trigonelline. These compounds attract S. meliloti to the surface of the root hairs of the plant where the bacteria begin secreting nod factor.o the surface of the root hairs of the plant where the bacteria begin secreting nod factor.
[edit] Bacteriophage
Several bacteriophages have been described which infect Sinorhizobium meliloti: Φ1, Φ1A, Φ2A, Φ3A, ΦRmp36A, ΦRmp38, ΦRmp86, ΦSP, ΦSSSS304, ΦSSSS305, ΦSSSS307, ΦSSSS308, and ΦT1.
